Apertures

What is Apertures?
Aperture is referred to the lens in the opening of the the photographic lens. The Apertures are also known as the Depth of Field. Which allows more or less light to hit the camera.

How and when is it useful
The smaller the f-stop the wider your aperture will be, and therefore let in more light. The bigger the f-stop the smaller your aperture will be.

Drawbacks
Can be a drawback for landscape photographers when they need to focus on an entire view rather than just one thing.

This shows us that the lower the aperture the blurrier the background and the more aperture you get you can get a clearer background rather than it being blurry.

This shows us that the aperture of f/2.8 only shows us the front of the picture while the aperture of f/16 gives us a clearer view of the whole picture which includes the background rather than just the front of the picture.